Nut-lock.



G; GASSADY.

NUT LOOK.

PLIOATION FILED 1111 26 1e AP 10. I 990,106. Patented Apr. 18, 1911.

3v WITNESSES: J memo/2 4 61 eorye awJ-Ja/zfl. BY

' ATTORNEY.

UNITE STATES PATENT OFFICE.

GEORGE GASSADY, OF VANCOUVER, BRITISH COLUMBIA, CANADA.

NUT-LOCK.

To all whom it may concern:

Be it known that I, GEORGE CAssAoY, a citizen of the Dominion of Canada,residing at Vancouver, in the Province of British Columbia, Canada, haveinvented a new and useful Nut-Lock, of which the following is aspecification.

This invention relates to a nut locking device designed to be containedwithin the body of the nut of which it practically forms a part, andthat is withal cheap to manufacture and simple to apply to the nut andto lock and release it on its bolt.

The invention is particularly described in the following specification,reference be ing made to the drawings by which it is accompanied, inwhich:

Figure 1, is a side elevation of a rail joint showing the application ofmy invention. Fig. 2, is a section of a nut, the locking pin beingpartly driven in. Fig. 3, is an elevation of a nut showing the pin inits unlocking position. Fig. 4, is a cross section of the rail on theline H of Fig. 1.

In these drawings 9. represents the body of the nut, 3 being the thread.Through this nut before the thread is tapped in it a hole is drilled ina plane approximately parallel to the face of the nut and tangential tothe thread, and a pin 4 tightly fitted in it; so that when the nut istapped a portion of the thread is cut, as shown in Figs. 2 and 3, in theside of the pin 4 as well as in i the nut. On entering the nut on thebolt the ends of the pin 4:, as shown in Fig. 1, should be flush withthe flats or side faces of the nut and when the nut has been screwed upto its desired place on the bolt the pin 4 is driven from one end so asto tighten, as shown in Fig. 2, the wedge-like portion 5 of the threadthat is cut in the pin 4: on the thread of the bolt. The pin may bedriven from either side but will preferably be driven from that side sothat a slackening effort on the nut will tend rather to draw the pinfurther into engagement than to move it back, thus with, a right handthread Specification of Letters Patent.

Application filed January 26, 1910.

Patented Apr. 18, 1911.

Serial No. 540,144.

the pin will be driven from left to right. An effective hold is thussecured by the nut on the thread of the bolt, and that, in a manner,that does not injure the thread of the bolt, as the portion of thethread of the pin that tightens the nut on the thread of the boltcorresponds to that thread. The means may also be readily released bydriving the pin back to its unlocking position (Fig. 3) and be reappliedwhen required as the repeated use of it does not deteriorate itseffectiveness. If for any reason greater security is called for a secondlock pin may be furnished in the same nut.

The device is equally applicable to square or hexagon nuts either blackforged or finished.

Having now particularly described my invention and the manner of itsuse, I hereby declare that what I claim as new and desire to beprotected in by Letters Patent, is:

In combination with a nut having diametrically opposite flats or sidefaces, said nut having a bolt hole and a pin receiving hole disposedtangentially to, and partly intersecting said bolt hole and extendingfrom one side face to the opposite side face and in a direction normalto said side faces, of a pin held in said pin hole and of a length equalto the length of said pin hole, said pin being threaded midway its endsto correspond to the threads of the bolt hole, said pin adapted to beforced longitudinally in said pin hole to project partly beyond one orthe other of said side faces when in its locking position and beingfurther adapted to lie wholly within said pin hole when in its unlockingposition, substantially as shown and described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE CASSADY.

Witnesses ROWLAND BRITTAIN, ALEXANDER SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

